RE: Today and Marsfontein2 Mar 2023 22:48
Alluvial Diamonds this is what we are in the process of mining now.
Over thousands of years, the kimberlite pipe that reaches the Earth’s surface is eroded and weathered by wind, rain, rivers and streams.The eroded kimberlite bears rough diamonds, which are carried downstream. The first diamonds discovered in South Africa were from alluvial deposits.
Today, industrial alluvial mining involves building a large wall to collect the water in one area. Diamonds are often found in the gravel layer, which collects under layers of other material, such as mud, clay and underwater plant-life. Once the gravel is collected, it is hauled to the surface and prepared for processing.
The worked-out Marsfontein diamond mine was host to eluvial diamond deposits running at grades of 1,433 cpht.
Botswana Diamonds it had recovered 11 diamonds and “abundant” kimberlitic indicators from drill samples at its Thorny River project in South Africa’s Limpopo province.
I love this quote
“The recovery of so many kimberlitic indicators and in particular diamonds, which are very rare to recover in small sample narrow reverse circulation drill holes is highly encouraging and bodes well for the potential commerciality of this exciting discovery,” the company said after analyzing the drill samples.
Botswana Diamonds noted the gems recovered were all of “good colour and clarity,” and were of commercial quality of a type in high demand.